Search Results - "Ahlen, S"
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Target Selection and Validation of DESI Luminous Red Galaxies
Published in The Astronomical journal (01-02-2023)“…Abstract The Dark Energy Spectroscopic Instrument (DESI) is carrying out a five-year survey that aims to measure the redshifts of tens of millions of galaxies…”
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DAHe white dwarfs from the DESI Survey
Published in Monthly notices of the Royal Astronomical Society (31-03-2023)“…ABSTRACT A new class of white dwarfs, dubbed DAHe, that present Zeeman-split Balmer lines in emission has recently emerged. However, the physical origin of…”
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SECONDARY PRODUCTION AS THE ORIGIN OF THE COSMIC-RAY POSITRON EXCESS
Published in The Astrophysical journal (10-02-2016)“…ABSTRACT The Alpha Magnetic Spectrometer has released high-precision data for cosmic rays, and has verified an excess of positrons relative to expectations…”
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Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument
Published in The Astronomical journal (01-08-2023)“…Abstract Millions of quasar spectra will be collected by the Dark Energy Spectroscopic Instrument (DESI), leading to a fourfold increase in the number of known…”
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A framework to measure the properties of intergalactic metal systems with two-point flux statistics
Published in Monthly notices of the Royal Astronomical Society (11-05-2023)“…ABSTRACT The abundance, temperature, and clustering of metals in the intergalactic medium are important parameters for understanding their cosmic evolution and…”
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Target Selection and Sample Characterization for the DESI LOW-Z Secondary Target Program
Published in The Astrophysical journal (01-09-2023)“…Abstract We introduce the DESI LOW- Z Secondary Target Survey, which combines the wide-area capabilities of the Dark Energy Spectroscopic Instrument (DESI)…”
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The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release
Published in Monthly notices of the Royal Astronomical Society (01-06-2024)“…ABSTRACT There is an overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A…”
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A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data
Published in The Astrophysical journal (01-02-2024)“…Abstract Extremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early…”
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Probing the Impact of Radio-mode Feedback on the Properties of the Cool Circumgalactic Medium
Published in The Astrophysical journal (01-10-2024)“…Abstract We explore the influence of radio-mode feedback on the properties of the cool circumgalactic medium (CGM). To this end, we assemble a statistical…”
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Archetype-based Redshift Estimation for the Dark Energy Spectroscopic Instrument Survey
Published in The Astronomical journal (01-09-2024)“…Abstract We present a computationally efficient galaxy archetype-based redshift estimation and spectral classification method for the Dark Energy Survey…”
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Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
Published in The European physical journal. C, Particles and fields (01-03-2011)“…A measurement of the production cross-section for top quark pairs ( bar{t} ) in pp collisions at s=7 TeV is presented using data recorded with the ATLAS…”
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Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey
Published in Monthly notices of the Royal Astronomical Society (02-07-2024)“…ABSTRACT Accurate mock galaxy catalogues are crucial to validate analysis pipelines used to constrain dark energy models. We present a fast HOD-fitting method…”
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A striking relationship between dust extinction and radio detection in DESI QSOs: evidence for a dusty blow-out phase in red QSOs
Published in Monthly notices of the Royal Astronomical Society (11-09-2023)“…ABSTRACT We present the first eight months of data from our secondary target programme within the ongoing Dark Energy Spectroscopic Instrument (DESI) survey…”
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Synthetic light-cone catalogues of modern redshift and weak lensing surveys with abacussummit
Published in Monthly notices of the Royal Astronomical Society (01-09-2023)“…ABSTRACT The joint analysis of different cosmological probes, such as galaxy clustering and weak lensing, can potentially yield invaluable insights into the…”
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Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane
Published in The Astronomical journal (01-10-2023)“…Abstract The Dark Energy Spectroscopic Instrument, consisting of 5020 robotic fiber positioners and associated systems on the Mayall telescope at Kitt Peak,…”
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Measuring Fiber Positioning Accuracy and Throughput with Fiber Dithering for the Dark Energy Spectroscopic Instrument
Published in The Astronomical journal (01-07-2024)“…Abstract Highly multiplexed, fiber-fed spectroscopy is enabling surveys of millions of stars and galaxies. The performance of these surveys depends on…”
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First dark matter search results from a surface run of the 10-L DMTPC directional dark matter detector
Published in Physics letters. B (10-01-2011)“…The Dark Matter Time Projection Chamber (DMTPC) is a low pressure (75 Torr CF4) 10 liter detector capable of measuring the vector direction of nuclear recoils…”
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Systematic Effects in Galaxy-Galaxy Lensing with DESI
Published in The open journal of astrophysics (16-07-2024)“…The Dark Energy Spectroscopic Instrument (DESI) survey will measure spectroscopic redshifts for millions of galaxies across roughly 14 , 000 d e g 2 of the…”
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Measurement of differential cross sections and W+/W−cross-section ratios for W boson production in association with jets at √s=8 TeV with the ATLAS detector
Published in The journal of high energy physics (01-05-2018)“…This paper presents a measurement of the W boson production cross section and the W +/W − cross-section ratio, both in association with jets, in proton-proton…”
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Search for new phenomena in events with three or more charged leptons in pp collisions at ... TeV with the ATLAS detector
Published in The journal of high energy physics (2015)“…(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).A generic search for anomalous production of events with at least three charged…”
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